CN102288534A - Fiber grating reinforced concrete rusting sensor with temperature compensation - Google Patents
Fiber grating reinforced concrete rusting sensor with temperature compensation Download PDFInfo
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- CN102288534A CN102288534A CN2011101206277A CN201110120627A CN102288534A CN 102288534 A CN102288534 A CN 102288534A CN 2011101206277 A CN2011101206277 A CN 2011101206277A CN 201110120627 A CN201110120627 A CN 201110120627A CN 102288534 A CN102288534 A CN 102288534A
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Abstract
The invention discloses a fiber grating reinforced concrete rusting sensor with temperature compensation, which belongs to the technical field of structural engineering and fiber sensing. The sensor is characterized in that a sensing probe is made by utilizing a reinforcing steel bar applied in engineering; an encapsulating component is provided with a hole matched with the sensing probe; the sensing probe passes through the hole, and then one end of the sensing probe is in contact with concrete to form an interface of a reinforcing steel bar material and the concrete, and the other end of the sensing probe is connected with a stainless steel cushion block in the sensor; the stainless steel cushion block is in contact with a metal sheet adhered with a stain monitoring fiber grating; a spring is mounted between the stainless steel cushion block and the encapsulating component; simultaneously, a metal sheet adhered with a temperature-compensating fiber grating is placed in the sensor, so as to correct the influence of an ambient temperature on strain monitoring; and finally, a fiber is protected by an armored optical cable, and then is led out from the inside of the sensor. The sensor has the effects and advantages that the measurement precision is high; the real-time quantitative monitoring can be carried out; the interface of the reinforced concrete is not damaged; and furthermore, the temperature monitoring in a structure can be achieved synchronously.
Description
Technical field
The invention belongs to Structural Engineering and technical field of optical fiber sensing, relate to a kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation.
Background technology
Fiber grating is the desirable sensing element that is used for long term monitoring, it has that high resolving power, high precision, volume are little, good endurance, anti-electromagnetic interference (EMI), can grow apart from advantages such as quasi-distributed real-time monitoring, thereby in the monitoring structural health conditions sensing technology, have broad application prospects, especially in the occasion of measuring stress and strain, has the incomparable advantage of some other sensor, be considered to be hopeful to be integrated in material internal in the intelligence structure most, survey the sensor of its damage.At present, more existing fiber grating is used to detect the sensor design scheme of the monitoring of reinforcement corrosion.
Liang Dakai, Wang Yan etc. have designed a kind of monitoring methods for reinforcement corrosion and sensor (CN200710021728) thereof of long period fiber grating, utilization is being pasted reinforcing bar position and is being placed a long period fiber grating straightly, regularly observing LPG transmitted spectrum by spectrometer changes, judge with this whether grating bending has taken place, and infer the degree and the speed of reinforcement corrosion.This invention can be monitored the reinforcement corrosion situation in the reinforced concrete member by the LPG transmitted spectrum monitoring to imbedding.But this sensor can not be authentic and valid the reaction reinforcing bar and the interface between the concrete, monitoring accuracy is not high in addition, also there is certain problem in the encapsulation of sensor, difficultly uses in engineering practice.
Dong Sa English, Wang Hongren etc. have invented sensitive membrane Fibre Optical Sensor of a kind of real-time monitoring metal erosion and preparation method thereof (CN200410035475).It comprises metal shell and is arranged in the metal shell and is connected the measure portion of metal shell, measure portion is made up of the FRP beam of uniform strength and two fiber gratings that are attached to FRP beam of uniform strength upper and lower surface, the extension line of fiber grating passes metal shell and draws, the inwall of metal shell is provided with metal baffle, be provided with calcium carbide above, the metal shell below is provided with transmission rod, be provided with the little rigid spring of precompressed between transmission rod one end and the metal shell inwall, the other end of transmission rod is provided with the FRP disk.But this corrosion sensor configuration complexity costs an arm and a leg, and reaction reinforcing bar that can not be authentic and valid and the interface between the concrete, is difficult to be applied on the reinforced concrete interface.
Therefore, though aspect the application Fiber Bragg Grating FBG monitoring corrosion correlative study is being arranged at present, the quantitatively corrosion of the inner reinforcing bar of precise monitoring xoncrete structure effectively.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of sensor of monitoring the reinforced concrete structure corrosion degree, be used for monitoring because the situation of concrete carbonization or chloride permeability steel bar corrosion in the reinforced concrete structure that rebar surface caused, especially to the quantitatively monitoring in real time of extent of steel corrosion.
Technical scheme of the present invention is:
A kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation comprises sensing probe, stainless steel cushion block, the sheet metal that is stained with the strain monitoring fiber grating, strain monitoring fiber grating, the sheet metal that is stained with temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable.
This sensor utilizes the reinforcing bar material of practical application in the engineering to become sensing probe, utilizes corrosion-resistant, good endurance, material package parts that rigidity is high; There is a hole that is complementary with sensing probe the package parts side, make sensing probe pass this Kong Houyi end face and can contact formation reinforcing bar material and concrete interface, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal with concrete; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating by two fulcrum again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously, revising environment temperature influences strain monitoring; Draw from sensor internal behind the last optical fiber process armouring cable protection.
In actual application, this sensor can be installed near the rebar surface, also can directly be arranged in the reinforced concrete structure protective seam.When concrete carbonization depth or chlorion arrival sensing probe position, the end generation corrosion that sensing probe contacts with concrete, after the sensing probe corrosion volumetric expansion taking place, promote sensing probe and move to sensor internal, and then makes the sheet metal that is stained with the strain monitoring fiber grating produce distortion.The distortion situation that monitors by the strain monitoring fiber grating, can realize Quantitative Monitoring to the sensing probe corrosion degree, because the reinforcing bar of using in the material of sensing probe and the engineering reality is identical, thereby can reflect accurately near the sensing probe or be in the corrosion situation of the reinforcing bar in the equivalent environment with sensing probe, revise the influence of environment temperature by the temperature compensation optical fiber grating of sensor internal again to monitoring steel bar corrosion, make monitoring steel bar corrosion simultaneously accurate more, realized the measurement of reinforced concrete structure internal temperature.This sensor medi-spring is used for resisting the impulsive force of concreting process to sensing probe, avoids in the concreting process because the excessive sensing probe that causes of impulsive force to the big displacement of sensor internal generation, causes the strain monitoring fiber grating to destroy.
Effect of the present invention and benefit are the measuring accuracy height, can carry out near real-time quantitative monitoring to steel bar corrosion, do not destroy reinforced concrete interface and can realize the monitoring of reinforced concrete structure temperature inside synchronously.
Description of drawings
Fig. 1 is the cross sectional representation that has the fiber grating reinforced concrete corrosion sensor of temperature compensation.
Fig. 2 is the longitudinal section synoptic diagram that has the fiber grating reinforced concrete corrosion sensor of temperature compensation.
Among the figure: 1 sensing probe; 2 stainless steel cushion blocks; 3 are stained with the sheet metal of strain monitoring fiber grating; 4 strain monitoring fiber gratings; 5 are stained with the sheet metal of temperature compensation optical fiber grating; 6 temperature compensation optical fiber gratings; 7 springs; 8 package parts; 9 armouring optical cables.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
A kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation comprises sensing probe, stainless steel cushion block, the sheet metal that is stained with the strain monitoring fiber grating, strain monitoring fiber grating, the sheet metal that is stained with temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable.This sensor can be used for monitoring bridge pier, cushion cap, beam, the corrosion situation of reinforcing bar in the important structure component of thing such as post.
Be that example specifies now with the corrosion of using reinforcing bar in the cylindrical bridge pier of this sensor monitors.At first utilize the reinforcing bar material identical to become sensing probe, utilize stainless steel material making package parts with steel bar stress in the bridge pier; Open a hole that is complementary with sensing probe simultaneously in the package parts side, make sensing probe pass this Kong Houyi end face and can contact formation reinforcing bar material and concrete interface, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal with concrete; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating by two fulcrum again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously and revise the influence of environment temperature strain monitoring; Last optical fiber is drawn from sensor internal after with the armouring cable protection.
After sensor production is finished, it is fixed on rebar surface with thin wire, fixing seasonal its sensing probe is towards the outside of cylindrical bridge pier.When concrete carbonization depth or chlorion arrival sensing probe position, the end generation corrosion that sensing probe contacts with concrete, produce volumetric expansion after the sensing probe corrosion, promote sensing probe and move, and then make the sheet metal that is stained with the strain monitoring fiber grating produce distortion to sensor internal.The distortion situation that monitors by the strain monitoring fiber grating, can realize Quantitative Monitoring to the sensing probe corrosion degree, because the reinforcing bar of using in the material of sensing probe and the bridge pier is identical, thereby can reflect accurately near the sensing probe and be in the corrosion situation of the reinforcing bar in the equivalent environment with sensing probe, revise the influence of environment temperature by the temperature compensation optical fiber grating of sensor internal again to monitoring steel bar corrosion, make monitoring steel bar corrosion simultaneously accurate more, realized the measurement of bridge pier internal temperature.This sensor medi-spring is used for resisting the impulsive force of concreting process to sensing probe, avoids in the concreting process because the excessive sensing probe that causes of impulsive force to the big displacement of sensor internal generation, causes the strain monitoring fiber grating to destroy.
Claims (1)
1. fiber grating reinforced concrete corrosion sensor that has temperature compensation, comprise sensing probe, the stainless steel cushion block, be stained with the sheet metal of strain monitoring fiber grating, the strain monitoring fiber grating, be stained with the sheet metal of temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable, it is characterized in that, there is a hole that is complementary with the sensing probe diameter package parts side, make sensing probe pass this Kong Houyi end face and contact formation reinforcing bar material and concrete interface with concrete, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating by two fulcrum again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously, revising environment temperature influences strain monitoring; Draw from sensor internal behind the last optical fiber process armouring cable protection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101206277A CN102288534B (en) | 2011-05-10 | 2011-05-10 | Fiber grating reinforced concrete rusting sensor with temperature compensation |
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| CN2011101206277A CN102288534B (en) | 2011-05-10 | 2011-05-10 | Fiber grating reinforced concrete rusting sensor with temperature compensation |
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| CN102288534A true CN102288534A (en) | 2011-12-21 |
| CN102288534B CN102288534B (en) | 2012-11-21 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928580A (en) * | 2012-11-20 | 2013-02-13 | 郑州大学 | Corrosion monitoring device and method for reinforcement bar in concrete structure |
| CN103616325A (en) * | 2013-11-27 | 2014-03-05 | 中交天津港湾工程研究院有限公司 | Optical fiber sensor combination for monitoring corrosion of reinforced concrete |
| CN104483258A (en) * | 2014-12-02 | 2015-04-01 | 浙江大学 | Corrosion-fatigue testing method for reinforced concrete on basis of optical-fiber sensing and device thereof |
| CN104849200A (en) * | 2015-05-22 | 2015-08-19 | 宋世德 | FBG (Fiber Bragg Grating) metal corrosion sensor with temperature compensation function and manufacturing method thereof |
| CN105300944A (en) * | 2015-11-11 | 2016-02-03 | 中国船舶重工集团公司第七二五研究所 | Concrete chloride ion etching optical fiber sensor based on fluorescence quenching and detection method thereof |
| CN105334221A (en) * | 2015-11-23 | 2016-02-17 | 天津城建大学 | Novel fiber optic sensing detecting device for reinforcement corrosion |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
| CN113008146A (en) * | 2021-02-26 | 2021-06-22 | 深圳大学 | Optical fiber sensing device, pipeline corrosion monitoring system and method |
| CN113089413A (en) * | 2021-04-21 | 2021-07-09 | 哈尔滨工业大学 | Intelligent dowel bar with embedded distributed optical fibers and manufacturing method thereof |
| CN113959935A (en) * | 2021-11-02 | 2022-01-21 | 燕山大学 | Steel bar corrosion monitoring device in reinforced concrete member |
| AU2021221640B2 (en) * | 2020-11-09 | 2022-09-15 | Yanshan University | A metal surface corrosion monitoring device with temperature compensation based on fiber grating |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928580A (en) * | 2012-11-20 | 2013-02-13 | 郑州大学 | Corrosion monitoring device and method for reinforcement bar in concrete structure |
| CN103616325A (en) * | 2013-11-27 | 2014-03-05 | 中交天津港湾工程研究院有限公司 | Optical fiber sensor combination for monitoring corrosion of reinforced concrete |
| CN103616325B (en) * | 2013-11-27 | 2015-10-28 | 中交天津港湾工程研究院有限公司 | Light fiber sensor combination is used in a kind of steel reinforced concrete erosion monitoring |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
| CN104483258A (en) * | 2014-12-02 | 2015-04-01 | 浙江大学 | Corrosion-fatigue testing method for reinforced concrete on basis of optical-fiber sensing and device thereof |
| CN104483258B (en) * | 2014-12-02 | 2017-02-22 | 浙江大学 | Corrosion-fatigue testing method for reinforced concrete on basis of optical-fiber sensing and device thereof |
| CN104849200B (en) * | 2015-05-22 | 2017-10-27 | 宋世德 | A kind of FBG metal erosion sensors with temperature compensation function and preparation method thereof |
| CN104849200A (en) * | 2015-05-22 | 2015-08-19 | 宋世德 | FBG (Fiber Bragg Grating) metal corrosion sensor with temperature compensation function and manufacturing method thereof |
| CN105300944A (en) * | 2015-11-11 | 2016-02-03 | 中国船舶重工集团公司第七二五研究所 | Concrete chloride ion etching optical fiber sensor based on fluorescence quenching and detection method thereof |
| CN105300944B (en) * | 2015-11-11 | 2018-09-28 | 中国船舶重工集团公司第七二五研究所 | A kind of concrete chloride ion corrosion fibre optical sensor and its detection method based on fluorescent quenching |
| CN105334221A (en) * | 2015-11-23 | 2016-02-17 | 天津城建大学 | Novel fiber optic sensing detecting device for reinforcement corrosion |
| AU2021221640B2 (en) * | 2020-11-09 | 2022-09-15 | Yanshan University | A metal surface corrosion monitoring device with temperature compensation based on fiber grating |
| CN113008146A (en) * | 2021-02-26 | 2021-06-22 | 深圳大学 | Optical fiber sensing device, pipeline corrosion monitoring system and method |
| CN113089413A (en) * | 2021-04-21 | 2021-07-09 | 哈尔滨工业大学 | Intelligent dowel bar with embedded distributed optical fibers and manufacturing method thereof |
| CN113959935A (en) * | 2021-11-02 | 2022-01-21 | 燕山大学 | Steel bar corrosion monitoring device in reinforced concrete member |
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Inventor after: Zhao Xuefeng Inventor after: Gong Peng Inventor after: Ba Qin Inventor after: Ou Jinping Inventor before: Gong Peng Inventor before: Zhao Xuefeng Inventor before: Ba Qin Inventor before: Ou Jinping |
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Granted publication date: 20121121 Termination date: 20170510 |